ORNL, NCAR are official partners in climate studies

03/08/04

OAK RIDGE, Tenn., March 8, 2004 -- More accurate global climate models are in the forecast because of a collaboration between the Department of Energy's Oak Ridge National Laboratory and the National Center for Atmospheric Research.

The memorandum of understanding announced today takes advantage of unique capabilities at each organization and makes official a long-standing research relationship between ORNL's Center for Computational Sciences and NCAR.

"Computing has become an integral part of the scientific enterprise, providing a link between theory and experiment for complex systems like the Earth's climate," said Jeff Wadsworth, director of ORNL. "Through collaborations like this, we are confident that we can make tremendous progress in understanding global climate change in much greater detail."

An important task for ORNL and NCAR will be to perform climate change simulations in support of the Intergovernmental Panel on Climate Change Fourth Assessment. The global climate change assessment community is eagerly awaiting the results, which will reflect the input from a number of institutions worldwide. The results will be announced in 2007.

The collaboration between ORNL and NCAR pools the vast simulation resources and scientific talent of the two institutions, which have considerable staff and computational hardware that can be used to explore novel experimental and computational designs. John Drake of the lab's Computer Science and Mathematics Division envisions the partnership leading to innovative solutions to problems and to more sophisticated models that focus on global carbon cycle, dynamic vegetation in the land model, more realistic hydrology and river routing, and progress in a number of other areas.

As part of this effort, the Center for Computational Sciences is providing dedicated computing resources to perform climate change simulations. The simulations could require several months to complete, even with 12 nodes (384 processors) of the IBM Cheetah's 27 nodes assigned to the task. And, equally important, the collaboration focuses on making the most of NCAR and ORNL's vast computing resources by benchmarking new architectures and evaluating programming models required for climate simulations.

"The re-emergence of Cray for scientific computation has changed the landscape of parallel computing," Drake said. "We expect to make very good use of the Cray X1 for atmosphere, ocean, land and sea ice climate simulations."

In recent years, ORNL and NCAR collaborated in the development of the Community Climate System Model and continue to study a broad range of scientific and technical challenges in modeling the Earth's climate. The CCSM simulates Earth's climate by performing modeling in the atmosphere, ocean, land and sea ice. The model is fully integrated and provides state-of-the-art computer simulations of the Earth's past, present and future climates.

Global climate modeling is considered vital to understanding potential effects of increased greenhouse gases and to evaluating likely effects of policies. As computing power continues to increase, models can become more sophisticated and take into account many more variables, thereby increasing the accuracy.

"The sustained partnership between NCAR and ORNL has contributed to our increasingly robust understanding of the causes and characteristics of past changes in Earth's climate," said NCAR Director Timothy Killeen. "The next generation of model, made possible though our continued collaborative work, will enable exciting new tools for scientists and decision makers interested in the nature and extent of future changes in the Earth system."

Source: Eurekalert & others

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